喷涂式轻质砂浆-冷弯薄壁型钢组合墙体立柱压弯性能研究  

Research on compression-bending behavior of cold-formed thin-walled steel framing composite wall stud with sprayed lightweight mortar

作　　者：李科龙[1,2] 郝际平[1] 田黎敏[1] 赵淋伟 王迎春[1] 赵秋利 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]中铁第一勘察设计院集团有限公司,陕西西安710043 [3]广州固保系统建筑材料有限公司,广东广州510070

出　　处：《建筑结构学报》2016年第11期97-105,共9页Journal of Building Structures

基　　金：国家自然科学基金项目(51178381;51408623);住房和城乡建设部科学技术项目(2012-K2-17);陕西省"13115"科技创新工程重大科技专项项目(2009ZDKG-66)

摘　　要：喷涂式轻质砂浆-冷弯薄壁型钢组合墙体是在冷弯薄壁型钢骨架区格间放置聚苯乙烯泡沫板,并在骨架外侧喷涂轻质砂浆制成。通过对3个喷涂式轻质砂浆-冷弯薄壁型钢组合墙体的压弯性能进行足尺试验,研究其受力过程、承载能力和破坏模式。结果表明:喷涂式轻质砂浆-冷弯薄壁型钢组合墙体的破坏现象为立柱中截面的受拉翼缘屈服;轻质砂浆对立柱的支承作用使立柱承载能力和抗弯刚度显著增加,并具有良好的压弯性能。采用考虑材料、几何和接触非线性的ANSYS有限元程序,对试验模型的受力性能进行模拟,非线性有限元模拟结果与试验结果吻合较好。以简支T形截面组合立柱作为计算模型,提出了考虑砂浆与立柱之间黏结滑移效应的组合立柱截面压弯强度计算式,采用有限元计算值和试验值对所给出的公式进行验证,结果较为吻合。The cold-formed thin-walled steel framing composite wall with sprayed lightweight mortar, in which polystyrene boards were placed in region of the cold-formed thin-walled steel frame and sprayed lightweight mortar was used outside the frame of the wall, was presented in this paper. Through the full-scale tests of three cold-formed thin- walled steel framing composite wall with sprayed lightweight mortar under compression-bending loading, the failure process, bearing capacity and failure mode were analyzed. The results show that the failure mode of the cold-formed thin-walled steel framing composite wall with sprayed lightweight mortar is tension flange yielding in the middle of the stud. Owing to the support of lightweight mortar, wall studs with sprayed lightweight mortar, which improves the load carrying capacity and bending stiffness greatly, have good compression-bending behavior. The simulation of the mechanical performance of the test model with ANSYS considering material, geometry and contact nonlinearity was carried out. The simulation results of the nonlinear finite element method agree with the test results. The T-shaped cross-section composite stud was regarded as the calculation model, and the calculation formula for the prediction of compression-bending capacity of composite stud cross section was put forward. This formula considers the bond and slippage effect. In the end, the finite element analysis results and the test results are used to verify the formula and shows a good agreement.

关 键 词：冷弯薄壁型钢组合墙体 立柱 喷涂轻质砂浆 静力试验 非线性有限元分析 压弯性能 

分 类 号：TU398.9[建筑科学—结构工程] TU317.1